Timer



FIG. 1 is a front perspective view of a timer showing my new design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a front view of the invention;

FIG. 4 is a rear elevation thereof, and,

FIG. 5 is a top plan view of the invention.

The broken lines in the drawings are for illustrative purposes only and do not form part of the claimed design. 

The ornamental design for a timer, as shown and described. 